module.exports = {
     chainWebpack:config=>{
        config.when(process.env.NODE_ENV === 'production',config=>{
           config.entry('app').clear().add('./src/main-prod.js')
           config.set('externals',{
              vue:'Vue',
              'vue-router':'VueRouter',
              axios:'axios',
              lodash:'_',
              echarts:'echarts',
              nprogress:'NProgress',
              'vue-quill-editor':'VueQuillEditor'
           })
        })
        config.when(process.env.NODE_ENV === 'development',config=>{
         config.entry('app').clear().add('./src/main-dev.js')
      })
     }
}